Optical Fiber Loss & NA Tester, Model TNS20A

Experiments Covered

1. Determination of Numerical Aperture of Optical Fibers
2. Study of Losses in Fibers
3. Loss due to Air-gaps in Fibers with In-Line Adaptors

Standard Contents of Trainer

1. Optical Fiber Loss & NA Tester, TNS20A 1 no.
2. One-Meter PMMA Fiber Patchcord (Cable1) 1 no.
3. Five-Meter PMMA Fiber Patchcord (Cable2) 1 no.
4. In-Line SMA Adaptor 1 no.
5. Mandrel 1 no.
6. Numerical Aperture Measurement Jig 1 no.
7. Laboratory Manual 1 no.

Fiberoptic Analog Transmission Trainer, Model TNS20EA

Experiments Covered

1. Loss in Fibers at 660nm and 850nm
2. Characterisation of FO 660nm and 850 nm LEDs
3. Characterisation of FO Phototransistor
4. Design and Study of a Linear FO Intensity Modulation System for Analog Transmission
   1. Gain Characteristics of a Linear FO Intensity Modulation System
   2. Frequency Response of a Linear FO Intensity Modulation System
   3. Waveform Distortion in a Linear FO Intensity Modulation System
   4. Gain-Bandwidth Product of a Linear FO Intensity Modulation Receiver
5. Transmission of an Audio Signal through an Optical Fiber

Standard Contents of Trainer

1. Fiberoptic Analog Transmission Kit, TNS20EA-TX 1 no.
2. Fiberoptic Analog Transmission Kit, TNS20EA-RX 1 no.
3. One-Meter PMMA Fiber Patchcord (Cable1) 1 no.
4. Five-Meter PMMA Fibre Patchcord (Cable2) 1 no.
5. In-Line SMA Adaptor 1 no.
6. Laboratory Manual 1 no.

Fiberoptic Digital Transmission Trainer, Model TNS20ED

Experiments Covered

1. Design and Study of an FO Digital Link
2. Study of Rise-Time and Fall-Time Distortions
3. Study of Propogation Delay
4. Encoding Methods in FO Digital systems
   1. Baseband or Non Return to Zero (NRZ) Transmission
   2. Return to Zero Coding (RZ)
   3. Non Return to Zero Inverted Coding (NRZI)
   4. Biphase Coding
   5. Manchester Coding

Standard Contents of Trainer

1. Fiberoptic Digital Transmission Kit TNS20ED-TX 1 no.
2. Fiberoptic Digital Transmission Kit TNS20ED-RX 1 no.
3. Two-Meter PMMA Fiber Patchcord (Cable1) 1 no.
4. Laboratory Manual 1 no.

Laser Diode Intensity Modulation Trainer,
Model TNS20EL

Experiments Covered

1. Characterisation of a Laser Diode
   1. Characterisation of a Laser Diode
   2. Optical Power Output vs LD Forward Current (Threshold Current)
   3. Monitor Photodiode Current vs Optical Power Output
2. Study of ACC and APC Modes of Operation
3. Design and Evaluation of an LD Analog IM system
   1. Vo vs Vin at Specified Optical Carrier Power Levels, Po
   2. Determination of Vin (max) at Specified Po for Distortion-free Vo
   3. Comparison of ACC and APC IM Systems
4. Design and Evaluation of an LD Digital Transmission System
5. Transmission of Laser through an Optical Fiber
   1. Study with Step-Index Multimode Plastic Fiber Patchcord
   2. Study with Graded -Index, Multimode Glass Fiber Patchcord
   3. Study with a Mechanical Splice Connecting the Above Two Patchcords
6. Laser Free-Space Communication
   1. Analog Free Space Communication System
   2. Digital Free Space Communication System
7. Fo Numerical Aperture Measurement
   1. NA of PMMA Fiber
   2. NA of Glass Fiber

Standard Contents of Trainer

1. Laser Diode Transmission Kit TNS20EL TX Unit 1 no.
2. Laser Diode Transmission Kit TNS20EL RX Unit 1 no.
3. Two-meter PMMA Plastic Fiber Patchcord (Cable1) 1 no.
4. Two-meter GI/MM Glass Fiber Patchcord(Cable2) 1 no.
5. In-Line SMA Adaptor 1 no.
6. Numerical Aperture Measurement Jig 1 no.
7. Mandrel 1 no.
8. Laboratory Manual 1 no.